Oil burner



OIL BURNER ATTORNEYS May 7, 1935. v J. A. DAHLs'rRoM Er Al. 2.000,884

oIL BURNER Filed Oct. 5, 1933 BY y JAM Mv'uarm mgm nww 44u, @mk du ATTORNEYJ,

` May 7, '1935.l

J. A. DAHLSTROM ET AL OIL BURNER Filed oct. 5, 195s 5. sheets-Sheet :s

AITORNEYJ.

Patented May 7, 12935 vPATENT ori-fics OIL BURNER `Jolm Alger Dahlstrom. Bay Village, and William A. Bryson, Lakewood, Ohio, aasignors to Perfection Stove Company, Cleveland, Ohio, a

corporation of Ohio Application October 5,

17 Claims.

This invention relates to improvements in that class of combustion apparatus in which there is a burner bowl equipped with means for delivering fuel thereto and having a relatively large opening in its Wall through which access is had to its interior for lighting and cleaning purposes.

The invention has to do more particularly with means for admitting air to the burner bowl for promoting combustion, and it is especially applicable to relatively large burner bowls as it provides for admitting air to the central portion thereof to augment that entering adjacent the periphery of the bowl. This insures adequate and properly distributed air for effecting a combustable mixture throughout the whole interior of the bowl. Applying air to the center of the bowl aids combustion and permits more oil to be consumed at high re, and a correspondingly lesser amount of oil to be burned cleaner at low lire.

Broadly, there is nothing new in admitting air l to a burner through a central air distributor.

The novelty of our inventionresides, rst, in obtaining the central air supply from a source remote from that of the peripheral air supply, and in conducting it out of contact with the oil in the burner bowl; and, secondly, in attaching ,the air admitting means, which preferably consists of an air tube and distributing head, to the clo- I sure for the lighting ando clean-out opening. Amongthe advantages arising from these novel features are: the avoidance of any interference with the peripheral air supply, such as would rob certain parts, of the vaporous body within the bowl of its proper proportion of air and by so doing cause a smoky ilame; the avoidance of chilling, and thus retarding vaporization of the oil within the bowl; the ready removability of the air admitting means or distributor head for the purpose of cleaning it; the removability` of .the same to facilitate cleaning of theburner bowl; the ability to quickly and easily replace the air admitting means or distributor head in case it becomes burned out, and the ability to conveniently and economically apply the invention to apparatus of the aforesaid class that is in use and which was not originally equipped with the improvement. i

Other advantages will appear as 'we proceed to describein detail the embodiment of our'invention illustrated in the accompanying drawings wherein Fig. l isa central vertical section through the lower portion of'a warm air furnace equipped with the invention; Fig. 2 is a section on the line 2--2 of Fig. 1;' Fig. 3-.is acentral lon- 1933, Serial No. 692,308

gitudinal section through the air tube and distributor head applied to the closure for the lighting and clean-out opening of the burner bowl, and Fig. 4 is a right hand end view of the unit shown in Fig. 3.

Supported within a 4sheet metal shell I, on angle iron frames 2, through the medium of brackets 3, is a drum-like combustion chamber 4 having an annular bottom wall 5. Secured, as by bolts 6, to the underside of the wall 5 is the Al0 peripheral portion of an annulus 1 whose inner edge is turned downwardly to form a lip 8 that is arranged in spaced relation to a lip 9 that surrounds the inner edge of the annular top wall I0 0f a burner bowl II, the wall I0 being connected to and spaced from the annulus 'l by fastening means or rivets I2. The body of the burner bowl II is preferably drawn from relatively heavy sheet metal and includes a bottom wall I3 that is formed with a sump to which fuel is supplied through a -pipe Il. By suitable means (not .shown)-as, for example, a constant level supply means-the fuel level is maintained below the plane of the marginal portion of said bottom wall. Projecting forwardly from the peripheral wall of the burner bowl I I is a neck I5 that surrounds the lighting and clean-out opening to which the numeral I6 generallyY refers.

Enclosing, and spaced radially from, the burner bowl I I is a housing I9 consisting of a cylindrical wall 20, an annular top wall 2|, and a circular bottom wall 22, the former having its inner edge fastened to the underside of the annulus "I, and the latter having a, central opening 23 over which a deflect'or 24 is supported by brackets 25. Air is admitted to the interior of the housing 20 through an air duct 26 having a branch 21 that registers with the opening 23; and the admission of air to said duct may be controlled by a damper 28 that is located adjacent the forward end of the duct where the latter projects through the front of the shell I and is shown as covered by a perforated shield 29. 'Ihe air admitted through the duct 25 finds its Way to the interior of the burner bowl II through perforations 30 in the peripheral wall 45 thereof and through the space 3| between the annulus 'l and the top wall I0 of the bowl, the air enteringA through said space being deflected downwardly into thebowl as it escapes through the anfnular slot defined by the lips 8 and 9. The neck 504 neck I5 and its withdrawal therefrom. The plug l or closure is adapted to be secured within said neck by means consisting of a button Ml on the interior of the neck that engages within an L- shaped slot 4| in the cylindrical wall 36 of the body portion of the plug or closure. Thus a bayonet joint connection is effected between the closure and neck, and the transverse branch of said slot, being inclined to the longitudinal axis of the closure or plug in an appropriate direction, causes the closure or plug to be urged inwardly as it assumes normal position within the neck. This is especially advantageous when a gasket, such as that indicated at 43 in the enlarged views of Figs. 3 and 4, is used between the flange 38 and the end of the neck. The gasket is o f suitable packing material and may be held in place by one or more projections 44. While we have shown but one button 40 and slot 4|, obviously the number may be increased as desired.

Suitably secured, as by rivets 45, to the end Wall 3'| of the plug or closure 35, in register with an opening 46 therein, is the base flange 41 of an air tube 48 that has its inner end turned upwardly peripheral wall of said head is provided with per-l forations 52. It will be observed especially from- Fig. 4] that the tube 48 is so located with respect to the longitudinal axis of the plug or closure 35 that the distributor head 50 is practically within the diameter of the closure or plug.. Further, it

' will be observed that the headis located inwardly of the inner end of the plug or closure a distance substantially equal to the length of the latter. By reason of these facts, the head may be readily projected through thel neck and brought into position within the burner bowl as the plug or closure is inserted within the neck.

In the operation of the apparatus air additional to that admitted through the openings 3l) and the space 3l is drawn in through the hollow body of the plug or closure 35 and through the air tube 48 and is projected radially within the burner bowl through the perforations 52 of the distributor head 50. By obtaining the central air supply from a point outside the housing I9, there is no likelihood of depriving the openings 30 and the space 3| of their air requirements for maintaining a properly balanced condition inside the burner bowl; and by bringing the air admitting tube 48 into the burner which contributes to a more effective gasification of the fuel.

When it is desired to light the burner, the handle 39 is grasped and the plug or closure turned to bring the longitudinal branch of the slot 4| in line with the button 40 and the unit comprising said closure and the air tube is withdrawn from the neck I5. Oil admitted through the pipe |4 to the sump in the bottom of the bowl may now be ignited by placing a lighted match, taper, a piece of burning paper or other suitable material within the burner bowl through the opening I6, after which the closure 35 may be replaced. The charred match, paper or other material by which the oil was lighted may be left in the burner bowl, as its presence will not adversely affect the operation of the burner, and when such an amount of ,this charred material and carbon have accurnulated within the bowl as makes their removal desirable, the same may be cleaned out through the opening I6.

Having thus described our invention, what we vclaim is:

1. In combustion apparatus, a burner bowl, a housing enclosing and spaced from the bowl and having'an air admitting opening, the bowl being provided with means for admitting air adjacent its periphery from the space between the housing andbowl, 'air conducting means extending from a point outsi'dethe housing into the bowl from one side and above the bottom thereof and terminating approximately centrally of the bowl, and means for delivering fuel to the bowl.

2. In combustion apparatus, a burner bowl having an opening in its wall through which access is had to its interior, a closure for said opening,.meansv on the closure for carrying air into the interior portion' of the bowl in spaced relation to its peripheral wall, and further means for delivering fuel to the bowl.

3. In combustion apparatus, a burner bowl having an opening in its wall through which access is had to its interior, a closure for said opening, means carried by the closure for conducting air to the internal region'of the bowland spreading it toward the peripheral wall thereof, and further means 'for delivering fuel to the bowl.

4. In combustion apparatus, a burner bowl having an opening in its wall through which access is hadto its interior, a closure for said opening, means carried by the closure for admitting air to the bowl substantially centrally thereof, and means for delivering fuel to the bowl.

5. In combustion apparatus, a burner bowl having an opening in its wall through which access is had to its interior, a closure for said opening, means carried by the closure for admitting air to the bowl and distributing it substantially centrally thereof, and means for delivering fuel to the bowl.

6. In combustion apparatus, a burner bowl having an opening in its wall through which access is had to its interior, a closure for said opening, an air tube carried by said closure and projecting into the bowl, and means for delivering fuel to the bowl.

7. In combustion apparatus, a burner bowl having an opening in its wall through which ac- 10,'In combustion apparatus, a burner bowlA having an opening in its wall through which access is had to its interior, a closure for said opening, an air tube carried by said closure and projecting into the bowl, a perforated distributor head on the inner end of the tube for projecting air toward the peripheral wall of the bowl, and means for delivering fuel oil to the bowl.

11. In combustion apparatus, a burner bowl having an openingin its side wall through which access is had to its interior, a neck surrounding said opening, a plug for closing said opening, an air distributor projecting from the inner end of the plug and having, with the plug, an air admitting passageway, and means for delivering fuel to the bowl.

12. In combustion apparatus, a. burner bowl having an opening in its side wall through which access is had to itsA interior, a neck surrounding said opening, a plug for closing said opening, an air distributor projecting from the inner end of the plug and having, with the plug, an air admitting passageway, means for delivering fuel to the bowl, and means for sealing the joint between the plug and neck..

13. In combustion apparatus, a. burner bowl having an opening in its side wall through which access is had to its interior, a neck surrounding said opening, a hollow plug for closing said opening, an air distributor carried by the inner end of the plug and communicating with the interior thereof, and means for delivering fuel to the burner bowl.

14. In combustion apparatus, la burner bowl having an opening in its side wall through which access is had to its interior, a neck surrounding said opening, va. hollow plug for closing said opening and having a bayonet Joint connection with said neck, a handle on the outer end of the plug, an air distributor carried by the inner end of the plug and communicating with the interior thereof," and means for delivering fuel to the burner bowl.

15, In combustion apparatus, a burner .bowl having an opening in its side wall through which access may be had to the interior thereoffor lighting and cleaning purposes, a neck surrounding said opening and projecting forwardly from the bowl, a hollow plug for closing said opening v having a wall at its inner end, an ai'r tube carried by the end wall of the plug and projecting inwardly therefrom, said end wall having an opening Iregistering with the bore of the tube, a distributor head on the inner end of the tube, said head and tube being substantially within the dameter of the plug, and means for delivering fuel oil to the burner bowl. i

16. In combustion apparatus, a burner bowl having an opening in its side wall through which access may be had to the interior thereof for lighting and cleaning purposes, a, neck surrounding said opening and projecting forwardly from the bowl, a hollow plug for closing said opening having a. wall at its inn'er end and a flange at its outer end arranged in opposed relation to the corresponding end of the neck, a gasket interposed between said flange and neck, an air tube carried by the end wall ofthe plug and projecting inwardly therefrom and offset laterally from the longitudinal axis of the plug, the end wall having an opening registering with the bore of the tube, the inner end of the tube being formed with an elbow and having applied thereto a distributor head. said head being substantially within the diameter of the plug, and means for deliveringv JOHN ALGER DAHLSTROM. WILLIAM A. BRYSON.

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